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H. G. WILLIAMS,

DIE AND PLUNGER.

No. 80,042. PatentedJ-u-ly 14, 1868f glnitrb game game: @ffitr.

Letters Patent No. 80,042, dated July 14, 1868.

IMPROVEMENT IN DIES AND PLUNGERS.

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TO ALL WHOM IT MAY CONCERN:

Be it known that I, HENRY G. WILLIAMS, of Providence, in the county of Providence, 'andState of Rhode Island, have invented a new and improved Combined Die and Plunger; and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable those skilled in the art to make and use 'the same, reference being bad tothe accompanying drawings, forming part of this'specification,

This-invention relates to a methodof forming tin and metallic boxes and covers for the same.

And the invention' consists in the application of a double plunger, one of which is actuated byte, spring, and a'fluted die, as will be hereinafter described. 7

Figure 1 represents a section of the dieand plungers combined, the section being through the linexa: of fig. 2.

Figure 2'is a vertical section of fig. 1 throughthe linevy'y.

Similar letters of reference indicate corresponding parts.

A is the die, the upper inside corner. of which is fluted or serrated, as seen in the drawing at B, so as to allow the tin or other metal to crimp evenly, and thereby prevent lapping in such armanner as to render the box or cover liablo to injury from use.

C Cis the main plunger, which setsover'tlle die, as seen in the drawing, the inner portion, C, being the size of the inside of the box made in the'die, and the outer portion, C, being a cutter on the outside of the die. A

for cutting the metal to size,

D is an inner; plunger on the end of the stem E. v

.Upon the top end of the stem E there is a nut,[F, by which the tcnsion of the spring may be increased or diminished. I

G is a spiral spring around the'stem, which bears agamst a shculder,-li., in the main plunger and upon the plunger D with a. constant pressure, so thatit isforced thereby below the face of the main plunger when pressare or power is removed.

This action of, the spring-plunger is for the purpose of clearing the box or cover from the dies and main plunger. A I

I The box or piece of metal which has been struck up is seen represented in red in fig. 2f v The tin or other metal'in being forced into the die is evenly crimped and drawn by thefiuting B, and forced into permanent shape. I l

- Without thefluting the metal is liable to tap unevenly, 'so that the laps in the corners become loosened .or.

drawn apart when placed upon the box, and the cover is rendered useless thereby.

Havingthus described my invention, I claim as new, 'and'clesire to secure by Lctters-Patent The die A, when its upper inside edge is flutedor serrated as described, whereby the tin or other metal to be struck up iscrimped evenly to prevent the uneven lapping and consequent breaking ofthe metal as herein set forth. I

HENRY G. WILLIAMS.

Wi tn ess cs HEIFRY MARTIN, CHARLES SELDEN. 

